coresight: etm4x: Fix accesses to TRCCIDCTLR1

coresight: etm4x: Fix accesses to TRCCIDCTLR1

The TRCCIDCTLR1 is only implemented if TRCIDR4.NUMCIDC > 4.
Don't touch the register if it is not implemented.

Cc: stable@vger.kernel.org
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20201127175256.1092685-5-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>